It is actually real spectrum, with REAL uses.

The problem with the various "white space" goodies is that in their zeal to function, they WILL interfere with existing broadcast devices. Just because the transmitter can't hear the conflicting unit doesn't mean that a 3rd party won't hear both the real transmitter, and the interfering (white space) transmitter. The whole object of these devices is RANGE so they want to be heard. This means that they will cause interference. There are MANY unlicensed bands to use, the broadcast "white space" isn't one of them. The current use of the UHF tv spectrum (470-700MHz) is getting more crowded because they just sold off the 700-800 MHz part (USA channels 55-69). Given that the channel allocations vary all over our wonderful country, the "white space" devices have NO IDEA where to place their signal in the 230 MHz of bandwidth.

It isn't going to work. Go to 2.4GHz!!